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Momentum-transfer study of topological insulators using electron microscopy and spectroscopy

Research Project

Project/Area Number 16H05965
Research Category

Grant-in-Aid for Young Scientists (A)

Allocation TypeSingle-year Grants
Research Field Nanostructural physics
Research InstitutionNational Institute for Materials Science

Principal Investigator

KIKKAWA Jun  国立研究開発法人物質・材料研究機構, 先端材料解析研究拠点, 主任研究員 (20435754)

Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥10,010,000 (Direct Cost: ¥7,700,000、Indirect Cost: ¥2,310,000)
Fiscal Year 2019: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2018: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2017: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Keywords電子エネルギー損失分光 / 電子顕微鏡 / 運動量移送 / トポロジカル絶縁体 / 超高エネルギー分解能 / 電子顕微鏡法 / 電子エネルギー損失分光法 / 表面・界面物性
Outline of Final Research Achievements

In this study, I have developed fundamental technology for probing surface electronic properties of topological insulators at the nanometer scale: (i) growth of nanometer-thick specimen for improving detection efficiency of the surface signal, (ii) linear momentum-transfer dependent spectroscopy for measuring dispersion relations, (iii) improvement of energy resolution for detecting low-energy excitations and (iv) generation of electron beams with orbital angular momenta.

Academic Significance and Societal Importance of the Research Achievements

本研究は、トポロジカル絶縁体の表面電子物性をナノスケールで計測する基礎技術を確立する目的で進めたものであるが、得られた基礎技術は、他の低エネルギー励起や磁性を有する材料系にも広く応用できる点で学術的意義がある。国家戦略としても重要視されている量子マテリアルの解析に応用ができる点で社会的意義がある。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (10 results)

All 2020 2019 2018 2017 2016

All Journal Article (1 results) (of which Peer Reviewed: 1 results) Presentation (9 results) (of which Invited: 1 results)

  • [Journal Article] Identifying lithium K edge anisotropy in LiCoO22018

    • Author(s)
      Jun Kikkawa, Teruyasu Mizoguchi, Masao Arai, Takuro Nagai, Koji Kimoto.
    • Journal Title

      Physical Review B

      Volume: 98 Issue: 7 Pages: 0751031-6

    • DOI

      10.1103/physrevb.98.075103

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Presentation] 散乱ベクトル依存EELSによるBi2Se3の誘電応答計測2020

    • Author(s)
      吉川 純、木本浩司
    • Organizer
      日本顕微鏡学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 最新モノクロメータと分光・検出系による電子顕微鏡計測2020

    • Author(s)
      吉川 純
    • Organizer
      NIMS先端計測シンポジウム2020
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] EELS:波数ベクトル分解と超高エネルギー分解能2019

    • Author(s)
      吉川 純
    • Organizer
      マテリアルサイエンス分析技術セミナー2019
    • Related Report
      2019 Annual Research Report
  • [Presentation] トポロジカル絶縁体のEELS計測2019

    • Author(s)
      吉川 純
    • Organizer
      NIMS先端計測シンポジウム
    • Related Report
      2018 Annual Research Report
  • [Presentation] Anisotropy of lithium K edge in LiCoO2 studied by EELS2018

    • Author(s)
      Jun Kikkawa, Teruyasu Mizoguchi, Takuro Nagai, Koji Kimoto
    • Organizer
      19th International Microscopy Congress
    • Related Report
      2018 Annual Research Report
  • [Presentation] トポロジカル絶縁体ナノシートの成長と評価2017

    • Author(s)
      吉川純
    • Organizer
      MI・計測合同シンポジウム2018
    • Related Report
      2017 Annual Research Report
  • [Presentation] Scattering-vector dependent EELS of LiCoO22017

    • Author(s)
      Jun Kikkawa, Teruyasu Mizoguchi, Takuro Nagai, Koji Kimoto
    • Organizer
      EDGE2017: Enhanced Data Generated by Electrons
    • Related Report
      2017 Annual Research Report
  • [Presentation] Li-K吸収端異方性の電子エネルギー損失分光2017

    • Author(s)
      吉川純、溝口照康、長井拓郎、木本浩司
    • Organizer
      共用・計測合同シンポジウム2017
    • Place of Presentation
      物質・材料研究機構(茨城県つくば市)
    • Related Report
      2016 Annual Research Report
  • [Presentation] Li-K吸収端の異方性のEELS計測2016

    • Author(s)
      吉川純、溝口照康、長井拓郎、木本浩司
    • Organizer
      日本顕微鏡学会第72回学術講演会
    • Place of Presentation
      仙台国際センター(宮城県仙台市)
    • Year and Date
      2016-06-14
    • Related Report
      2016 Annual Research Report

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Published: 2016-04-21   Modified: 2021-02-19  

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